CN117441305A

CN117441305A - Advanced adaptive receiver based on spectrum efficiency utilization

Info

Publication number: CN117441305A
Application number: CN202280028798.3A
Authority: CN
Inventors: R·苏德; S·达斯; W·沈; U·巴纳尼; M·勒努; V·K·兰加姆加里
Original assignee: Qualcomm Inc
Current assignee: Qualcomm Inc
Priority date: 2021-04-23
Filing date: 2022-05-20
Publication date: 2024-01-23
Also published as: EP4327489A2; WO2022226431A3; WO2022226431A2; US20220361225A1

Abstract

Methods, systems, and devices for wireless communications are described. A User Equipment (UE) may receive one or more downlink grants when operating according to a first reception state during a threshold number of Transmission Time Intervals (TTIs). The UE may determine a weighting factor for each TTI within a threshold number of TTIs, wherein the determined weighting factor is based on a spectral efficiency (SPEF) of channel communications between the UE and the base station. The UE may sum a subset of the weighting factors to determine a transition determination value and may transition from the first reception state to the second reception state based on an evaluation of the transition determination value.

Description

Advanced adaptive receiver based on spectrum efficiency utilization

Cross reference

This patent application claims the benefit of U.S. patent application Ser. No. 17/239,391, entitled "ADVANCED ADAPTIVE RECEIVERS BASED ON SPECTRAL EFFICIENCY UTILIZATION," filed by SOOD et al at 2021, 4/23, which is assigned to the assignee of the present application.

Technical Field

The following relates to wireless communications, including advanced adaptive receivers based on spectral efficiency utilization.

Background

Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be able to support communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems, such as Long Term Evolution (LTE) systems, LTE-advanced (LTE-a) systems, or LTE-APro systems, and fifth generation (5G) systems, which may be referred to as New Radio (NR) systems. These systems may employ techniques such as the following: code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal FDMA (OFDMA), or discrete fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communication system may include one or more base stations or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise referred to as User Equipment (UE).

The UE may receive downlink communications including downlink grants from the base station using multiple receive antennas. Techniques for receiving and evaluating downlink grants at a UE are desired.

Disclosure of Invention

The described technology relates to improved methods, systems, devices, and apparatus supporting advanced adaptive receivers based on spectral efficiency (SPEF) utilization. In general, the described techniques provide improved measurement and evaluation of downlink traffic conditions. A wireless device, such as a User Equipment (UE), may use a traffic state machine (STM) to evaluate traffic statistics for receiving downlink information in a wireless communication system. For example, the UE may transition between different reception states using different numbers of active reception antennas based on the number of downlink grants the UE receives in a time interval.

The UE may implement a number of techniques that may allow for adaptively measuring traffic conditions based on a weighted calculation involving spectral efficiency SPEF of the received downlink grant. For example, the UE may calculate one or more weighting factors (η) for a set of Transmission Time Intervals (TTIs), the UE evaluating the weighting factors based on a ratio between a granted SPEF (e.g., a number of information bits per resource element scheduled for the UE) and a reported SPEF (e.g., an estimate of information bits per resource element that it may reliably decode). The UE may apply a weighting factor to the burst detection function or the scheduling rate function to determine a transition determination value for transitioning to a different reception state. The UE may transition to a different reception state based on the value of the transition determination value exceeding the threshold.

A method for wireless communication at a UE is described. The method may include: in operating according to a first reception state of a set of multiple reception states at the UE, one or more downlink grants are received from a base station over a threshold number of Transmission Time Intervals (TTIs), a weighting factor for each TTI over the threshold number of TTIs is determined, each of the weighting factors being based on a SPEF of channel communications between the base station and the UE, at least a subset of the weighting factors are summed to identify a transition determination value, and a transition from the first reception state to a second reception state of the set of multiple reception states is performed based on the transition determination value.

An apparatus for wireless communication at a User Equipment (UE) is described. The apparatus may include: the system includes a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the device to: in operating according to a first reception state of a set of multiple reception states at the UE, one or more downlink grants are received from a base station over a threshold number of Transmission Time Intervals (TTIs), a weighting factor for each TTI over the threshold number of TTIs is determined, each of the weighting factors being based on a SPEF of channel communications between the base station and the UE, at least a subset of the weighting factors are summed to identify a transition determination value, and a transition from the first reception state to a second reception state of the set of multiple reception states is performed based on the transition determination value.

An apparatus for wireless communication at a User Equipment (UE) is described. The apparatus may include: the apparatus includes means for receiving one or more downlink grants from a base station over a threshold number of Transmission Time Intervals (TTIs) when operating according to a first one of a set of multiple reception states at the UE, means for determining a weighting factor for each TTI over the threshold number of TTIs, each of the weighting factors being based on a SPEF of channel communications between the base station and the UE, means for summing at least a subset of the weighting factors to identify a transition determination value, and means for transitioning from the first one of the set of multiple reception states to a second one of the reception states based on the transition determination value.

A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to: in operating according to a first reception state of a set of multiple reception states at the UE, one or more downlink grants are received from a base station over a threshold number of Transmission Time Intervals (TTIs), a weighting factor for each TTI over the threshold number of TTIs is determined, each of the weighting factors being based on a SPEF of channel communications between the base station and the UE, at least a subset of the weighting factors are summed to identify a transition determination value, and a transition from the first reception state to a second reception state of the set of multiple reception states is performed based on the transition determination value.

Some examples of the methods, apparatus, and non-transitory computer readable media described herein may also include operations, features, units, or instructions to: a SPEF for channel communication between the base station and the UE for each TTI is determined based on a ratio between a first SPEF associated with scheduling information bits for each resource element scheduled by the base station and a second SPEF associated with a number of information bits for each resource element that the UE may be able to decode.

Some examples of the methods, apparatus, and non-transitory computer readable media described herein may also include operations, features, units, or instructions to: the first SPEF is determined by summing one or more SPEF values for one or more respective codewords of a downlink grant, each of the one or more SPEF values being a product of a number of layers, a code rate, and a modulation order associated with the downlink grant for each of the one or more respective codewords.

Some examples of the methods, apparatus, and non-transitory computer readable media described herein may also include operations, features, units, or instructions to: the second SPEF is determined by estimating, at the UE, a capability to decode the number of information bits for each resource element.

Some examples of the methods, apparatus, and non-transitory computer readable media described herein may also include operations, features, units, or instructions to: a channel state information report is sent to the base station based on the mapping between the second SPEF and a rank indication, a channel quality index, or both.

In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, summing at least the subset of the weighting factors to identify the conversion-determined value may include operations, features, units, or instructions to: respective weighting factors corresponding to respective TTIs that may have at least one of the one or more downlink grants are summed.

In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the transition determination values comprise burst detection transition determination values based on summing at least the subset of the weighting factors according to a burst detection function, and the methods, apparatus, and non-transitory computer-readable media may further include operations, features, units, or instructions to: determining whether to transition from the first reception state to the second reception state based on the burst detection transition determination value, wherein the first reception state includes a reception non-permission state, and the second reception state includes a reception standby state.

Some examples of the methods, apparatus, and non-transitory computer readable media described herein may also include operations, features, units, or instructions to: the burst detect transition determination value is compared with a threshold burst detect transition determination value and a determination is made as to whether to transition from the first reception state to the second reception state based on the comparison.

Some examples of the methods, apparatus, and non-transitory computer readable media described herein may also include operations, features, units, or instructions to: based on the burst detection transition determination value exceeding a threshold burst detection transition determination value, a transition from the first reception state to the second reception state is determined.

In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the threshold burst detection transition determination value is configured based on long-term downlink traffic statistics, short-term downlink traffic statistics, or both.

In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the transition determination values comprise scheduling rate transition determination values based on summing at least the subset of the weighting factors according to a scheduling rate function, and the methods, apparatus, and non-transitory computer-readable media may further include operations, features, units, or instructions to: determining whether to transition from the first reception state to the second reception state based on the scheduling rate transition determination value, wherein the first reception state includes a reception standby state and the second reception state includes a reception non-permission state.

Some examples of the methods, apparatus, and non-transitory computer readable media described herein may also include operations, features, units, or instructions to: the transition determination value is compared to a threshold scheduling rate transition determination value and a determination is made as to whether to transition from the first receiving state to the second receiving state based on the comparison.

Some examples of the methods, apparatus, and non-transitory computer readable media described herein may also include operations, features, units, or instructions to: a transition from the first receiving state to the second receiving state is determined based on the scheduling rate transition determination exceeding the threshold scheduling rate transition determination.

In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the threshold scheduling rate transition determination value may be configured based on long-term downlink traffic statistics, short-term downlink traffic statistics, or both.

In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first reception state may be associated with a first number of reception antennas and the second reception state may be associated with a second number of reception antennas different from the first number of reception antennas.

In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the weighting factor may be a function of subframe index of the one or more downlink grants.

In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more downlink grants include a one-layer grant, a two-layer grant, or a combination thereof.

Drawings

Fig. 1 illustrates an example of a wireless communication system supporting an advanced adaptive receiver based on spectral efficiency (SPEF) utilization in accordance with aspects of the present disclosure.

Fig. 2 illustrates an example of a wireless communication system supporting an advanced adaptive receiver based on SPEF utilization in accordance with aspects of the present disclosure.

FIG. 3 illustrates an example of a traffic state machine (STM) configuration supporting an advanced adaptive receiver based on SPEF utilization in accordance with aspects of the present disclosure.

FIG. 4 illustrates an example of a process flow of an advanced adaptive receiver supporting SPEF utilization in accordance with aspects of the present disclosure.

Fig. 5 and 6 illustrate block diagrams of devices supporting advanced adaptive receivers based on SPEF utilization in accordance with aspects of the present disclosure.

FIG. 7 illustrates a block diagram of a communication manager supporting an advanced adaptive receiver based on SPEF utilization in accordance with aspects of the present disclosure.

FIG. 8 illustrates a diagram of a system including a device supporting an advanced adaptive receiver based on SPEF utilization in accordance with aspects of the present disclosure.

Fig. 9-13 show flowcharts illustrating methods of supporting a high-level adaptive receiver based on SPEF utilization in accordance with aspects of the present disclosure.

Detailed Description

In some wireless communication systems, a UE may use a traffic state machine (STM) to evaluate long-term and short-term traffic statistics for receiving downlink information from network entities such as base stations. Accordingly, the UE may transition between different reception states using different numbers of active reception antennas (e.g., different Adaptive Receive Diversity (ARD)) based on downlink traffic observed in the system. For example, if the UE is in a first state, such as an adaptive receive (ARx) standby state, the UE may use from 1 receive (Rx) antenna to 4 Rx antennas based on the number of downlink grants the UE receives during the time interval. However, if the number of grants received by the UE during the time interval falls below a threshold, the UE may transition to a second state, e.g., an ARx disallowed state, in which the UE may use 1 Rx antenna to at most 2 Rx antennas based on downlink traffic. The UE may transition back to the ARx standby state when the number of grants received by the UE exceeds a threshold.

However, the process of the UE determining whether to transition between states based solely on the grant count during the time interval fails to take into account the payload of the grant, the coding rate, and other factors that may affect the potential power savings and overall performance of the UE. Thus, in some cases, the UE may implement techniques that may allow traffic conditions to be measured more adaptively based on weighted calculations of spectral efficiency (SPEF) of received downlink grants.

For example, the UE may calculate the weighting factor (denoted η) based on a ratio between the granted SPEF (e.g., the number of information bits per resource element scheduled for the UE) and the reported SPEF (e.g., an estimate of the information bits per resource element that the UE is able to reliably decode). The UE may apply η to a burst detection function that counts the number of grants received by the UE operating in an ARx disallowed state. The UE may transition to an ARx standby state if the number of weighted grants determined by the weighted burst detection function exceeds a threshold. Further, the UE may apply η to the scheduling rate function when operating in the ARx standby state to determine a weighted scheduling rate of the received downlink grant. If the weighted scheduling rate of the downlink grant falls below a threshold, the UE may transition to an ARx disallowed state.

Various aspects of the present disclosure are first described in the context of a wireless communication system. Aspects of the present disclosure are further described in the context of n STM configuration and process flow. Aspects of the present disclosure are further illustrated by, and described with reference to, apparatus diagrams, system diagrams, and flowcharts relating to a high-level adaptive receiver based on SPEF utilization.

Fig. 1 illustrates an example of a wireless communication system 100 supporting an advanced adaptive receiver based on SPEF utilization in accordance with aspects of the present disclosure. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an LTE-advanced (LTE-a) network, an LTE-a Pro network, or a New Radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, or communications with low cost and low complexity devices, or any combination thereof.

The base stations 105 may be dispersed throughout a geographic area to form the wireless communication system 100 and may be devices of different forms or with different capabilities. The base station 105 and the UE 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 and ues 115 and base stations 105 may establish one or more communication links 125 over the coverage area 110. Coverage area 110 may be an example of such a geographic area: over the geographic area, base stations 105 and UEs 115 may support transmitting signals in accordance with one or more radio access technologies.

The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary, or mobile, or both at different times. The UE 115 may be a different form or device with different capabilities. Some example UEs 115 are shown in fig. 1. The UEs 115 described herein are capable of communicating with various types of devices, such as other UEs 115, base stations 105, or network devices (e.g., core network nodes, relay devices, integrated Access and Backhaul (IAB) nodes, or other network devices), as shown in fig. 1.

The base stations 105 may communicate with the core network 130, or with each other, or both. For example, the base station 105 may interface with the core network 130 through one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 may communicate with each other directly (e.g., directly between the base stations 105) over the backhaul link 120 (e.g., via an X2, xn, or other interface), indirectly (e.g., via the core network 130), or both. In some examples, the backhaul link 120 may be or include one or more wireless links.

One or more of the base stations 105 described herein may include or may be referred to by those of ordinary skill in the art as a base station transceiver, a radio base station, an access point, a radio transceiver, a node B, an evolved node B (eNB), a next generation node B or a gigabit node B (either of which may be referred to as a gNB), a home node B, a home evolved node B, or some other suitable terminology.

The UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where a "device" may also be referred to as a unit, station, terminal, or client, among other examples. The UE 115 may also include or be referred to as a personal electronic device, such as a cellular telephone, a Personal Digital Assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, the UE 115 may include or be referred to as a Wireless Local Loop (WLL) station, an internet of things (IoT) device, a internet of things (IoE) device, or a Machine Type Communication (MTC) device, among other examples, which may be implemented in various items such as appliances, or vehicles, meters, among other examples.

The UEs 115 described herein may be capable of communicating with various types of devices, such as other UEs 115 that may sometimes act as relays, as well as base stations 105 and network devices (including macro enbs or gnbs, small cell enbs or gnbs, or relay base stations, among other examples), as shown in fig. 1.

The UE 115 and the base station 105 may communicate wirelessly with each other over one or more carriers via one or more communication links 125. The term "carrier" may refer to a set of radio frequency spectrum resources having a defined physical layer structure to support the communication link 125. For example, the carrier for communication link 125 may include a portion (e.g., a bandwidth portion (BWP)) of a radio frequency spectrum band that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE-A, LTE-a Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling to coordinate operation for the carrier, user data, or other signaling. The wireless communication system 100 may support communication with UEs 115 using carrier aggregation or multi-carrier operation. According to a carrier aggregation configuration, the UE 115 may be configured with a plurality of downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used with both Frequency Division Duplex (FDD) component carriers and Time Division Duplex (TDD) component carriers.

In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers. The carrier may be associated with a frequency channel, such as an evolved universal mobile telecommunications system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN), and may be positioned according to a channel grating (ras) for UE 115 discovery. The carrier may operate in an standalone mode, where the UE 115 may initially acquire and connect via the carrier, or the carrier may operate in a non-standalone mode, where a connection is anchored using a different carrier (e.g., of the same or different radio access technology).

The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. The carrier may carry downlink or uplink communications (e.g., in FDD mode) or may be configured to carry downlink and uplink communications (e.g., in TDD mode).

The carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of a determined number of bandwidths (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)) for a number of carriers of a particular radio access technology. Devices of wireless communication system 100 (e.g., base station 105, UE 115, or both) may have a hardware configuration that supports communication over a particular carrier bandwidth or may be configurable to support communication over one of a set of carrier bandwidths. In some examples, wireless communication system 100 may include a base station 105 or UE 115 that supports simultaneous communication via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate over part (e.g., sub-band, BWP) or all of the carrier bandwidth.

The signal waveform transmitted on the carrier may be composed of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as Orthogonal Frequency Division Multiplexing (OFDM) or discrete fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element may include one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Thus, the more resource elements that the UE 115 receives and the higher the order of the modulation scheme, the higher the data rate for the UE 115 can be. The wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase the data rate or data integrity for communication with the UE 115.

One or more digital schemes (numerology) for carriers may be supported, where a digital scheme may include a subcarrier spacing (Δf) and a cyclic prefix. The carrier wave may be divided into one or more BWP with the same or different digital schemes. In some examples, UE 115 may be configured with multiple BWP. In some examples, a single BWP for a carrier may be active at a given time and communication for UE 115 may be limited to one or more active BWP.

May be in a basic time unit (which may be referred to as T, for example _s ＝1/(Δf _max ·N _f ) Sampling period of seconds, where Δf _max Can represent the maximum supported subcarrier spacing, and N _f Can represent the mostLarge supported Discrete Fourier Transform (DFT) size) to represent the time interval for the base station 105 or UE 115. The time intervals of the communication resources may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a System Frame Number (SFN) (e.g., ranging from 0 to 1023).

Each frame may include a plurality of consecutively numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a number of slots. Alternatively, each frame may include a variable number of slots, and the number of slots may depend on the subcarrier spacing. Each slot may include a number of symbol periods (e.g., depending on the length of the cyclic prefix added before each symbol period). In some wireless communication systems 100, a time slot may be further divided into a plurality of minislots containing one or more symbols. Excluding cyclic prefixes, each symbol period may contain one or more (e.g., N _f A number) of sampling periods. The duration of the symbol period may depend on the subcarrier spacing or the operating frequency band.

A subframe, slot, minislot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a TTI. In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in the form of bursts of shortened TTIs (sTTIs)).

The physical channels may be multiplexed on the carrier according to various techniques. For example, the physical control channels and physical data channels may be multiplexed on the downlink carrier using one or more of Time Division Multiplexing (TDM), frequency Division Multiplexing (FDM), or hybrid TDM-FDM techniques. The control region (e.g., control resource set (CORESET)) for the physical control channel may be defined by a number of symbol periods and may extend across a system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESET) may be configured for a group of UEs 115. For example, one or more of UEs 115 may monitor or search for control regions for control information according to one or more sets of search spaces, and each set of search spaces may include one or more control channel candidates at one or more aggregation levels arranged in a cascade. The aggregation level for control channel candidates may refer to the number of control channel resources (e.g., control Channel Elements (CCEs)) associated with coding information for a control information format having a given payload size. The set of search spaces may include a common set of search spaces configured to transmit control information to a plurality of UEs 115 and a UE-specific set of search spaces configured to transmit control information to a particular UE 115.

Each base station 105 may provide communication coverage via one or more cells (e.g., macro cells, small cells, hot spots, or other types of cells, or any combination thereof). The term "cell" may refer to a logical communication entity that communicates with the base station 105 (e.g., on a carrier) and may be associated with an identifier (e.g., a Physical Cell Identifier (PCID), a Virtual Cell Identifier (VCID), or other identifier) that is used to distinguish between neighboring cells. In some examples, a cell may also refer to a geographic coverage area 110 or a portion (e.g., a sector) of geographic coverage area 110 over which a logical communication entity operates. Such cells may range from smaller areas (e.g., structures, subsets of structures) to larger areas depending on various factors such as the capabilities of the base station 105. For example, a cell may be or include a building, a subset of buildings, or an outside space between or overlapping geographic coverage areas 110, as well as other examples.

A macro cell typically covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs 115 with service subscription with the network provider supporting the macro cell. The small cell may be associated with a lower power base station 105 than the macro cell, and the small cell may operate in the same or a different (e.g., licensed, unlicensed) frequency band as the macro cell. The small cell may provide unrestricted access to UEs 115 with service subscription with the network provider or may provide restricted access to UEs 115 with association with the small cell (e.g., UEs 115 in a Closed Subscriber Group (CSG), UEs 115 associated with users in a home or office). The base station 105 may support one or more cells and may also support communication over one or more cells using one or more component carriers.

In some examples, a carrier may support multiple cells and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access to different types of devices.

In some examples, the base station 105 may be mobile and, thus, provide communication coverage for a mobile geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of base stations 105 use the same or different radio access technologies to provide coverage for respective geographic coverage areas 110.

The wireless communication system 100 may support synchronous or asynchronous operation. For synchronous operation, the base stations 105 may have similar frame timing with transmissions from different base stations 105 approximately aligned in time. For asynchronous operation, the base stations 105 may have different frame timing, and in some examples, transmissions from different base stations 105 may not be aligned in time. The techniques described herein may be used for synchronous operation as well as asynchronous operation.

Some UEs 115, such as MTC or IoT devices, may be low cost or low complexity devices and may provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to a data communication technology that allows devices to communicate with each other or with the base station 105 without manual intervention. In some examples, M2M communications or MTC may include communications from devices integrated with sensors or meters that measure or capture information and relay the information to a central server or application that may leverage the information or present the information to personnel interacting with the application. Some UEs 115 may be designed to collect information or to implement automated behavior of a machine or other device. Examples of applications for MTC devices include: intelligent metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business billing.

Some UEs 115 may be configured to employ a reduced power consumption mode of operation, such as half-duplex communications (e.g., a mode that supports unidirectional communications for transmission or reception, but not simultaneous transmission and reception). In some examples, half-duplex communications may be performed at a reduced peak rate. Other power saving techniques for UE 115 include: when not engaged in active communication, a power-saving deep sleep mode is entered, operating on limited bandwidth (e.g., according to narrowband communication), or a combination of these techniques. For example, some UEs 115 may be configured to operate using narrowband protocol types associated with a defined portion or range (e.g., a set of subcarriers or Resource Blocks (RBs)) within a carrier, within a guard band of a carrier, or outside of a carrier.

The wireless communication system 100 may be configured to support ultra-reliable communication or low-latency communication, or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low latency communications (URLLC) or mission critical communications. The UE 115 may be designed to support ultra-reliable, low latency, or critical functions (e.g., mission critical functions). The ultra-reliable communication may include private communication or group communication, and may be supported by one or more mission critical services, such as mission critical push-to-talk (MCPTT), mission critical video (MCVideo), or mission critical data (MCData). Support for mission critical functions may include prioritization of services, and mission critical services may be used for public safety or general business applications. The terms ultra-reliable, low latency, mission critical, and ultra-reliable low latency are used interchangeably herein.

In some examples, the UE 115 may also be capable of communicating directly (e.g., using peer-to-peer (P2P) or D2D protocols) with other UEs 115 over a device-to-device (D2D) communication link 135. One or more UEs 115 utilizing D2D communication may be within the geographic coverage area 110 of the base station 105. Other UEs 115 in such a group may be outside of the geographic coverage area 110 of the base station 105 or otherwise unable to receive transmissions from the base station 105. In some examples, groups of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system in which each UE 115 transmits to each other UE 115 in the group. In some examples, the base station 105 facilitates scheduling of resources for D2D communications. In other cases, D2D communication is performed between UEs 115 without involving base station 105.

In some systems, D2D communication link 135 may be an example of a communication channel (e.g., a lateral link communication channel) between vehicles (e.g., UEs 115). In some examples, the vehicles may communicate using vehicle networking (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these. The vehicle may signal information related to traffic conditions, signal scheduling, weather, safety, emergency, or any other information related to the V2X system. In some examples, vehicles in the V2X system may communicate with a roadside infrastructure (e.g., roadside units), or use vehicle-to-network (V2N) communications to communicate with a network via one or more network nodes (e.g., base stations 105), or both.

The core network 130 may provide user authentication, access permissions, tracking, internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an Evolved Packet Core (EPC) or a 5G core (5 GC), which may include at least one control plane entity (e.g., a Mobility Management Entity (MME), an access and mobility management function (AMF)) that manages access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), a Packet Data Network (PDN) gateway (P-GW), or a User Plane Function (UPF)) that routes packets to or interconnects to an external network. The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the core network 130. The user IP packets may be transmitted through a user plane entity that may provide IP address assignment as well as other functions. The user plane entity may be connected to IP services 150 for one or more network operators. IP services 150 may include access to the internet, intranets, IP Multimedia Subsystem (IMS), or packet switched streaming services.

Some of the network devices (e.g., base stations 105) may include subcomponents such as access network entity 140, which may be an example of an Access Node Controller (ANC). Each access network entity 140 may communicate with UEs 115 through one or more other access network transport entities 145, which may be referred to as radio heads, smart radio heads, or transmit/receive points (TRPs). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or incorporated into a single network device (e.g., base station 105).

The wireless communication system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Typically, the region from 300MHz to 3GHz is referred to as the Ultra High Frequency (UHF) region or decimeter band, because wavelengths range in length from approximately one decimeter to one meter. UHF waves may be blocked or redirected by building and environmental features, but the waves may be sufficiently transparent to the structure for a macrocell to provide service to UEs 115 located indoors. Transmission of UHF waves may be associated with smaller antennas and shorter distances (e.g., less than 100 kilometers) than transmission of smaller and longer waves using the High Frequency (HF) or Very High Frequency (VHF) portions of the spectrum below 300 MHz.

The wireless communication system 100 may also operate in the ultra-high frequency (SHF) region of the spectrum using a frequency band from 3GHz to 30GHz, also referred to as the centimeter-band, or in the extremely-high frequency (EHF) region of the spectrum, for example, from 30GHz to 300GHz, also referred to as the millimeter-band. In some examples, wireless communication system 100 may support millimeter wave (mmW) communications between UE 115 and base station 105, and the EHF antennas of the respective devices may be even smaller and more compact than UHF antennas. In some examples, this may facilitate the use of an antenna array within the device. However, the propagation of EHF transmissions may suffer from greater atmospheric attenuation and shorter transmission distances than SHF or UHF transmissions. In transmissions using one or more different frequency regions, the techniques disclosed herein may be employed, and the designated use of frequency bands across these frequency regions may vary from country to country or regulatory agency.

The wireless communication system 100 may utilize licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ Licensed Assisted Access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in unlicensed frequency bands, such as the 5GHz industrial, scientific, and medical (ISM) frequency bands. Devices such as base station 105 and UE 115 may employ carrier sensing to enable collision detection and avoidance when operating in the unlicensed radio frequency spectrum band. In some examples, operation in the unlicensed band may be based on a carrier aggregation configuration that incorporates component carriers operating in the licensed band (e.g., LAA). Operations in the unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.

Base station 105 or UE 115 may be equipped with multiple antennas that may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels (which may support MIMO operation or transmit or receive beamforming). For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly (e.g., antenna tower). In some examples, antennas or antenna arrays associated with base station 105 may be located in different geographic locations. The base station 105 may have an antenna array with a number of rows and columns of antenna ports that the base station 105 may use to support beamforming for communication with the UE 115. Also, UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

Base station 105 or UE 115 may utilize multipath signal propagation using MIMO communication and increase SPEF by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing. For example, the transmitting device may transmit multiple signals via different antennas or different combinations of antennas. Also, the receiving device may receive multiple signals via different antennas or different combinations of antennas. Each of the plurality of signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or a different data stream (e.g., a different codeword). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO) (in which multiple spatial layers are transmitted to the same receiving device) and multi-user MIMO (MU-MIMO) (in which multiple spatial layers are transmitted to multiple devices).

Beamforming (which may also be referred to as spatial filtering, directional transmission or directional reception) is a signal processing technique as follows: the techniques may be used at a transmitting device or a receiving device (e.g., base station 105, UE 115) to form or steer antenna beams (e.g., transmit beams, receive beams) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by: signals transmitted via antenna elements of the antenna array are combined such that some signals propagating in a particular direction relative to the antenna array experience constructive interference while other signals experience destructive interference. The adjusting of the signal transmitted via the antenna element may include: the transmitting device or the receiving device applies an amplitude offset, a phase offset, or both to the signal carried via the antenna element associated with the device. The adjustment associated with each of the antenna elements may be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to an antenna array of the transmitting device or the receiving device, or relative to some other orientation).

As part of the beamforming operation, the base station 105 or UE 115 may use beam scanning techniques. For example, the base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with the UE 115. The base station 105 may transmit some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) multiple times in different directions. For example, the base station 105 may transmit signals according to different sets of beamforming weights associated with different transmission directions. Transmissions in different beam directions may be used (e.g., by a transmitting device (such as base station 105) or by a receiving device (such as UE 115)) to identify the beam direction for subsequent transmission or reception by base station 105.

The base station 105 may transmit some signals (e.g., data signals associated with a particular receiving device (e.g., UE 115)) in a single beam direction (e.g., a direction associated with the receiving device). In some examples, the beam direction associated with transmissions along a single beam direction may be determined based on signals transmitted in one or more beam directions. For example, the UE 115 may receive one or more of the signals transmitted by the base station 105 in different directions and may report an indication to the base station 105 of the signal received by the UE 115 with the highest signal quality or otherwise acceptable signal quality.

In some examples, transmission by a device (e.g., base station 105 or UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from base station 105 to UE 115). The UE 115 may report feedback indicating precoding weights for one or more beam directions and the feedback may correspond to a configured number of beams spanning a system bandwidth or one or more subbands. The base station 105 may transmit reference signals (e.g., cell-specific reference signals (CRSs), channel state information reference signals (CSI-RS)) that may or may not be precoded. The UE 115 may provide feedback for beam selection, which may be a Precoding Matrix Indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook). Although these techniques are described with reference to signals transmitted by the base station 105 in one or more directions, the UE 115 may employ similar techniques to transmit signals multiple times in different directions (e.g., to identify beam directions for subsequent transmission or reception by the UE 115) or in a single direction (e.g., to transmit data to a receiving device).

Upon receiving various signals, such as synchronization signals, reference signals, beam selection signals, or other control signals, from the base station 105, a receiving device (e.g., UE 115) may attempt multiple receive configurations (e.g., directed listening). For example, the receiving device may receive via different antenna sub-arrays, by processing received signals according to different antenna sub-arrays, by receiving according to different sets of receive beamforming weights (e.g., different sets of directional listening weights) applied to signals received at multiple antenna elements of the antenna array, or by processing received signals according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of the antenna array (any of the above operations may be referred to as "listening" according to different receive configurations or receive directions). In some examples, the receiving device may use a single receiving configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receive configuration may be aligned on a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or otherwise acceptable signal quality based on listening according to multiple beam directions).

The wireless communication system 100 may be a packet-based network that operates according to a layered protocol stack. In the user plane, communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. The Radio Link Control (RLC) layer may perform packet segmentation and reassembly for transmission over logical channels. The Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels to transport channels. The MAC layer may also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer to improve link efficiency. In the control plane, a Radio Resource Control (RRC) protocol layer may provide for the establishment, configuration, and maintenance of an RRC connection between the UE 115 and the base station 105 or core network 130, which supports radio bearers for user plane data. At the physical layer, transport channels may be mapped to physical channels.

The UE 115 and the base station 105 may support retransmission of data to increase the likelihood that the data is successfully received. Hybrid automatic repeat request (HARQ) feedback is a technique for increasing the likelihood that data is properly received over the communication link 125. HARQ may include a combination of error detection (e.g., using Cyclic Redundancy Check (CRC)), forward Error Correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve throughput at the MAC layer under poor radio conditions (e.g., low signal and noise conditions). In some examples, a device may support the same slot HARQ feedback, where the device may provide HARQ feedback in a particular slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent time slot or according to some other time interval.

A UE 115 operating in the wireless communication system 100 may use the STM to evaluate traffic statistics for receiving downlink information from the base station 105. Thus, UE 115 may transition between different reception states using different numbers of active receive antennas. For example, if the UE 115 is in a first state, such as an ARx standby state, the UE 115 may use up to 4 Rx antennas based on the number of downlink grants received by the UE 115 during a time interval. However, if the number of grants received by the UE over the time interval falls below a threshold, the UE 115 may transition to a second state, e.g., an ARx disallowed state, where the UE 115 may use up to 2 Rx antennas based on downlink traffic.

In some cases, UE 115 may implement techniques that may allow for more adaptive measurement of traffic conditions based on weighted calculation of the SPEF of the received downlink grant. For example, the UE 115 may calculate the weighting factor (η) based on a ratio between the granted SPEF (e.g., the number of information bits per resource element scheduled for the UE 115) and the reported SPEF (e.g., an estimate of the information bits per resource element that it may reliably decode). The UE 115 may apply η to a burst detection function that counts the number of grants received by the UE 115 operating in an ARx disallowed state. The UE 115 may transition to the ARx standby state if the number of weighted grants determined by the weighted burst detection function exceeds a threshold. Further, UE 115 may apply η to the scheduling rate function when operating in the ARx standby state to determine a weighted scheduling rate for the received downlink grant. If the weighted scheduling rate of the downlink grant falls below a threshold, the UE 115 may transition to an ARx disallowed state.

Fig. 2 illustrates an example of a wireless communication system 200 supporting an advanced adaptive receiver based on SPEF utilization in accordance with aspects of the present disclosure. In some examples, wireless communication system 200 may implement aspects of wireless communication system 100. For example, wireless communication system 200 may support communication between UE 115-a and base station 105-a, which may be examples of corresponding devices described with reference to fig. 1. In addition, the UE 115-a may support advanced receiver features that enhance downlink communications between the UE 115-a and the base station 105-b.

The UE 115-a may use the STM 210 to evaluate both long-term and short-term traffic statistics (particularly downlink traffic patterns) received from the base station 105-a. For example, the STM may include a plurality of macro states (e.g., states 215 and 220) for capturing long-term statistics, and sub-states within each macro state 215 and 220 may identify a plurality of power saving opportunities (e.g., opportunities for the UE 115-a to reduce the number of receive antennas for accommodating downlink traffic) from short-term traffic statistics.

The UE 115-a may use the STM 210 to evaluate the number of downlink grants 205 received from the base station 105-a within a given time interval, the coding rate associated with each downlink grant, and the information payload (e.g., the number of bits per resource element) associated with the downlink grant 205 that the UE 115-a is able to reliably decode, among other metrics. In some examples, the UE 115-a may use the STM 210, the UE 115-a may use ARD to operate, which refers to managing the number of receive antennas to minimize the power consumption of the UE 115-a and improve the tradeoff of the UE 115-a in power performance.

Implementations of ARD may enable UE 115-a to switch between various antenna configurations (e.g., 1Rx, baseline 2Rx, best 2Rx, or 4 Rx) based on downlink traffic patterns (e.g., inter-arrival times between grants or grant sizes) and some Radio Frequency (RF) network conditions (e.g., reference Signal Received Power (RSRP), signal-to-noise ratio (SNR), antenna correlation, SPEF, etc.). In some examples, the use of ARD (e.g., reporting the highest Rx ready condition (readiness) to the network via rank reporting and other Channel State Function (CSF) metrics) may allow the UE 115-a to reduce power consumption while increasing the efficiency of downlink scheduling from the base station 105-a. In addition to ARD, STM 210 may drive other advanced receiver (ARx) features, such as cell-specific reference signal (CRS) Interference Cancellation (IC), and other features.

In some examples, the STM 210 may implement macro state transitions related to different receiver state configurations supported by the UE 115-a based on an evaluation of long-term or short-term downlink traffic statistics. For example, the UE 115-a may enter a first ARx state, such as the ARx standby state 220, which may be implemented when downlink traffic exceeds a threshold (e.g., the number of downlink grants 205 counted by the STM 210 during a time interval is above a threshold number), indicating a large amount of downlink traffic. While in the ARx standby state 220, the UE 115-a may operate according to multiple sub-states of the macro state 220. For example, the UE 115-a may operate in a conditional 4x state, where the UE 115-a uses a 4x or "best 2x" antenna. Additionally or alternatively, the UE 115 may operate in the condition 1x state and may use 1Rx or baseline 2Rx antennas depending on various system conditions.

If the number of received downlink grants 205 falls below a threshold, the UE 115-a may transition to an ARx not allowed state 215. For example, while operating in the ARx standby state 220, the UE 115-a may calculate the Scheduling Rate (SR) as a moving average of the number of downlink grants 205 received in a previous number of downlink subframes (e.g., 200 previous downlink subframes). If the calculated scheduling rate falls below a threshold percentage (e.g., 10%), the UE 115-a may transition to an ARx not allowed state.

When operating in the ARx not allowed state 215, the UE 115-a may use a multi-baseline 2Rx antenna (configuration using antennas indexed 0 and 1, rx 01), including antenna configurations of 1Rx and baseline 2 Rx. If the number of downlink grants 205 received by the UE 115-a during the time interval exceeds a threshold, the UE 115-a may transition back to the ARx standby state 220. For example, the UE 115-a may evaluate the burst detection criteria 230 to determine the number of grants received within a threshold period of time (e.g., if the UE 115-a is W during discontinuous reception activity periods _B Detection of ρ or more in consecutive downlink subframes _B A plurality of downlink grants, where ρ _B ＝5，W _B ＝32。)。

If the number of downlink grants 205 received by the UE 115-a during the time interval falls below a non-allowed threshold for ARx, the UE 115-a may transition to the mandatory rank 1 state 225 (e.g., insignificant downlink utilization). In this case, the channel state feedback report is forced to rank=1, and the UE 115-a may remain at 1Rx to save power. For example, the UE 115-a may calculate the utilization as a moving average of the grant size or the total capacity, and when the utilization is less than a threshold (e.g., less than 2%), the UE 115-a may disallow a transition from ARx to forced R1. When the utilization is above a threshold (e.g., above 2%), the UE 115-a may transition from mandatory R1 to ARx disallow. The UE 115-a may determine to transition between the various ARx states based only on the number of downlink grants 205 received during a defined time interval.

In each macro state (e.g., ARx standby, ARx disallowed or forced R1), there is a steady state and a condition 1Rx (C1 Rx) sub-state. When UE 115-a receives downlink traffic, the steady state sub-state may be implemented for normal operation, while the C1Rx state may be implemented after downlink reception is idle for a threshold sub-frame (e.g., if at W _FB0 =20 or W _FB1 No downlink grant is received within 48 downlink subframes, UE 115-a may remain in the C1Rx state). In some cases, the UE 115-a may remain in the C1Rx mode to save power while maintaining Physical Downlink Control Channel (PDCCH) performance.

However, in some cases, transitions between the ARx states of the STM 210 may be based only on a count of the number of downlink grants 205 received during the time interval, which may reduce power savings for the UE 115-a. For example, if the UE 115-a is in the ARx disallowed state 215 with the baseline 2Rx antenna configuration enabled, the UE 115-a may decode the layer 1 and layer 2 downlink grants 205 scheduled by the base station 105-a so that the burst detection criteria 230 are met, which may enable a transition to ARx standby, where the UE 115-a enables 4Rx and consumes more power. However, since 2Rx may be sufficient to decode up to two layers of grants, the UE 115-a should remain in an ARx disallowed state to save power (but may still transition to ARx standby based on the grant count). Additionally or alternatively, if the UE 115-a is in an ARx standby state, but the base station 105-a schedules a layer 1 or 2 grant such that the scheduling rate exceeds the low scheduling threshold 235, the UE 115-a may stay at 4Rx and consume more power when it should transition to an ARx disallow using 2Rx without causing any throughput loss.

In some other examples, the UE115-a may use a calculation of the Utilization (UR) to trigger an ARx state transition. The utilization may be defined as:

where the Transport Block (TB) size is the number of information bits sent in one subframe, SPEF is based on the most recent Channel Quality Indicator (CQI), and #re is the number of resource elements across the entire frequency bandwidth used by the base station 105-a to send the downlink grant 205 to the UE 115-a. The UE115-a may use the utilization value to trigger transitions between ARx states. However, utilization may not be an effective metric to trigger state transitions because a downlink grant 205 with a high Modulation Coding Scheme (MCS) value may have a small resource block allocation and thus a smaller frequency bandwidth, which may correspond to a low UR value. For example, when the signal-to-noise ratio (SNR) of the channel for the downlink grant transmission is below a threshold, UE115-a may transition to a 4Rx antenna configuration to achieve a better block error rate (BLER) and achieve higher signal throughput.

In such an example, if the UE115-a is in the ARx disallowed state 215, the utilization associated with the received downlink grant 205 may be too low to allow the UE115-a to transition to the ARx standby state 220 to enable the 4Rx antenna configuration, so the UE115-a may continue to cause a higher BLER. Conversely, if the UE115-a is currently in an ARx standby state, the low utilization downlink grant 205 may trigger the UE115-a to transition to an ARx disallowed state 215, resulting in a higher BLER. Additionally or alternatively, if the SNR of the channel is above a threshold, the UE115-a may determine to transition to the ARx standby state 220 and enable the 4Rx antenna configuration, but if the utilization associated with the downlink grant 205 is below the threshold, the UE115-a may not transition, which may result in lower throughput.

To more adaptively measure traffic conditions and more accurately determine the time to transition to different reception states, the UE 115-a may implement a number of different techniques that implement the number of grants scheduled by the base station 105-a and the number of grants decoded by the UE 115-a in terms of spectral efficiency (SPEF). Traffic conditions are adaptively measured, for example, based on a weighted calculation of the SPEF of the received downlink grant. The UE 115-a may calculate the weighting factor based on a ratio between the granted SPEF (e.g., the number of information bits per resource element scheduled for the UE 115-a) and the reported SPEF (e.g., an estimate of the information bits per resource element that the UE 115-a is able to reliably decode). Specifically, the weighting factor may be defined as η, wherein:

the UE may apply η to a burst detection function 230 that counts the number of grants received by the UE 115-a operating in the ARx disallowed state 215. The UE 115-a may transition to the ARx standby state 220 if the number of weighted grants determined by the weighted burst detection function exceeds a threshold. In addition, UE 115-a may apply η to scheduling rate function 235 when operating in ARx standby state 220 to determine a weighted scheduling rate for a received downlink grant. If the weighted scheduling rate of the downlink grant falls below a threshold, the UE 115-a may transition to an ARx not allowed state.

FIG. 3 illustrates an example of an STM configuration 300 supporting an advanced adaptive receiver based on SPEF utilization in accordance with aspects of the present disclosure. In some examples, STM configuration 300 may be an example of STM 210 described with reference to fig. 2, and may be implemented by a device (e.g., UE 115) described with reference to fig. 1 and 2. The UE may use STM 300 to evaluate long-term and short-term traffic statistics (e.g., downlink traffic patterns) received from network entities. STM 300 may include a plurality of macro states (e.g., states 315 and 320) for capturing long-term statistics, as well as sub-states within each macro state. STM 300 may include additional macro states and sub-states beyond those included in the example of FIG. 3, e.g., STM 300 may include additional forced R1 macro states for low-schedule or idle operation scenarios.

To effectively transition between the various ARx states of STM 300, the UE may implement techniques to adaptively measure downlink traffic conditions based on the SPEF associated with the received downlink grant, and the UE may determine a moving weighted average of SPEs associated with the received downlink grant from the network. For example, the UE may calculate a weighting factor function that is a ratio of the admitted SPEF (e.g., the number of bits per resource element that the network schedules to the UE) to the reported SPEF (e.g., an estimate of the number of bits per resource element that the UE may reliably decode). For example, the weighting factor function may be defined as η, wherein:

For each grant received from the network, the UE may define granted_spaf as(e.g., information bits per RE), where Q is the number of codewords, for codeword Q, l _q Is the layer number, c _q Is the code rate, and m _q Is the modulation order. The UE may report Channel State Information (CSI) to the network, including a Rank Indication (RI) (e.g., spatial multiplexing degree as the number of layers in transmission supported by the channel) and a Channel Quality Index (CQI) (e.g., maximum code rate and modulation order of transmission that the UE can reliably decode). In some cases, the UE may obtain CSI by calculating the SPEF and mapping the calculated SPEF to RI and CQI. In some cases, this may be a reported_coef, which may be a UE estimate of the information bits of each RE that the UE may reliably decode.

The ratio η comparing the admitted SPEF to the reported SPEF may in some cases drive the transition between the ARx disallowed state 315 and the ARx standby state 320. For example, the UE may apply η to various traffic condition calculations to determine whether to transition between ARx states 315 and 320. For example, while in the ARx disallowed state 315, the UE may apply η to the burst detection function 305:

Wherein the method comprises the steps ofIs an indication Fu Hanshu given by:

by implementing the weighted burst detection factor 305, the ue may more accurately determine the density of downlink traffic. The UE may detect the weighted burst with bd [ n ]]And threshold ρ _B A comparison is made to determine whether to transition from the ARx disallow state 315 to the ARx standby state 320. For example, if bd [ n ]]>ρ _B The UE may transition from ARx disallow 315 to ARx standby 320 and if bd [ n ]]<ρ _B The UE may remain in the ARx not allowed state 315. In some cases, the threshold ρ _B May be a configurable threshold (e.g., a threshold configured by the network, which may be signaled to the UE), or a threshold ρ _B May be a static threshold identified by the UE.

In addition to burst detection, the UE may apply η to a scheduling rate function 310, which may be used to evaluate downlink traffic when the UE is in an ARx standby state 320. For example, the low scheduling rate function may be given by:

where l represents the first update (e.g., a periodic scheduled update occurs every 100 ms), α is the moving average filter parameter, and whereIs an indicator function.

The UE may schedule the weighted scheduling rate function sr [ l ]]And threshold ρ _S A comparison is made to determine whether to transition from the ARx standby state 320 to the ARx disallowed state 315. For example, if sr [ l ] ]<ρ _S The UE may be fromARx Standby 320 transitions to ARx not enabled 315 and if sr [ l ]]>ρ _S The UE may remain in the ARx standby state 320. In some cases, the threshold ρ _S May be a configurable threshold (e.g., a threshold percentage configured by the network, e.g., 25% or 10%, which may be signaled to the UE), or a threshold ρ _S May be a static threshold identified by the UE. Furthermore, the filter parameter α may be configurable (e.g., α may be 100 ms).

The UE may determine a moving average scheduling rate of the downlink grant 205 and if the scheduling rate falls below a threshold, the UE 115-a may transition back to the ARx not allowed state 215 in response to a decrease in downlink traffic. The eta factor allows the UE 115-a to more efficiently balance power consumption and data reception, thereby improving the power saving capabilities of the UE 115-a and overall UE 115-a performance.

By applying the η weighting factor to the burst detection function 305 and the low scheduling function 310, the ue may effectively evaluate the fraction of channel capacity being used by the network and may determine an ARx state transition based on both grant count and size and system capacity. These techniques may increase power savings and performance of the UE while increasing overall traffic throughput.

FIG. 4 illustrates an example of a process flow 400 of an advanced adaptive receiver supporting SPEF utilization in accordance with aspects of the present disclosure. In some examples, the process flow 400 may relate to aspects of the wireless communication system 100 or the wireless communication system 200. For example, process flow 400 may be implemented by base station 105-b and UE 115-b, which may be examples of base stations and UEs as described herein.

At 405, the base station 105-b may transmit and the UE 115-b may receive a plurality of downlink grants (e.g., layer 1 or layer 2 grants) within a threshold number of TTIs. The UE 115-b may receive one or more downlink grants when operating according to a first one of a plurality of reception states.

At 410, UE 115-b may determine a weighting factor for each TTI within the threshold number of TTIs, and each weighting factor determined by UE 115-b may be based on a SPEF of the channel communication between base station 105-b and UE 115-a. In some cases, the weighting factor may be a function of subframe index of one or more downlink grants.

In some examples, the UE 115-b may determine the SPEF per TTI based on a ratio between a first SPEF associated with the scheduling information bits per resource element scheduled by the base station 105-b and a second SPEF associated with a number of information bits per resource element that the UE 115-b is capable of decoding. In some examples, the UE 115-b may determine the first SPEF by summing one or more SPEF values for one or more corresponding codewords of the downlink grant (e.g., received in 405). In such an example, each of the one or more SPEF values may be a product of a number of layers associated with the downlink grant, a code rate, and a modulation order for a respective codeword of the one or more respective codewords. The UE 115-b may also determine the second SPEF based on the estimated capability of the UE 115-b to decode the number of information bits per resource element. In some cases, the UE 115-b may send a CSI report to the base station 105-b based on a mapping between the determined second SPEF and rank indication, and a channel quality index, or both.

At 415, UE 115-b may sum at least a subset of the weighting factors to identify a transition determination for the transition of UE 115-b from the first receive state to the second receive state (e.g., where the first receive state is associated with a first number of receive antennas and the second receive state is associated with a second number of receive antennas). For example, in some cases, UE 115-b may sum respective weighting factors corresponding to respective ones of a threshold number of TTIs having at least one of the one or more downlink grants.

At 420, ue 115-b may identify a transition determination value. In some examples, the transition determination value may be a burst detection transition determination value based on summing at least a subset of the weighting factors according to a burst detection function. Based on the burst detection function and the burst detection transition determination value, the UE 115-b may determine whether to transition from the first reception state to the second reception state (e.g., from the reception non-permission state to the reception standby state). UE 115-b may compare the burst detect transition determination value to a threshold burst detect transition determination value and may determine whether to transition from the first receive state to the second receive state based on the comparison. For example, in the event that the burst detection transition determination value exceeds the threshold burst detection transition determination value, the UE 115-b may determine to transition from the first reception state to the second reception state. The threshold burst detection transition determination value may be configured based on long-term downlink traffic statistics, short-term downlink traffic statistics, or both.

In some other examples, the transition determination value may be a scheduling rate transition determination value that UE 115-b may determine by summing at least a subset of the weighting factors according to a scheduling rate function. The UE 115-b may determine whether to transition from the first reception state to the second reception state (e.g., from the reception standby state to the reception non-allowed state) based on the scheduled rate transition determination value. In some cases, UE 115-b may compare the transition determination value to a threshold scheduling rate transition determination value and may determine whether to transition from the first receiving state to the second receiving state based on the comparison. For example, UE 115-b may determine to transition from the first receiving state to the second receiving state based on the scheduling rate transition determination exceeding the threshold scheduling rate transition determination. In some examples, the transition determination value may be configured based on long-term downlink traffic statistics, short-term downlink traffic statistics, or both.

At 425, ue 115-b may transition from a first reception state to a second reception state of the plurality of reception states based on the transition determination value.

FIG. 5 illustrates a block diagram 500 of a device 505 supporting an advanced adaptive receiver based on SPEF utilization in accordance with aspects of the present disclosure. The device 505 may be an example of aspects of the UE 115 as described herein. The device 505 may include a receiver 510, a transmitter 515, and a communication manager 520. The device 505 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

The receiver 510 may provide a means for receiving information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels associated with advanced adaptive receivers based on SPEF utilization). Information may be passed to other components of the device 505. The receiver 510 may utilize a single antenna or a set of multiple antennas.

The transmitter 515 may provide a means for transmitting signals generated by other components of the device 505. For example, the transmitter 515 may transmit information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels related to advanced adaptive receivers utilized based on SPEF). In some examples, the transmitter 515 may be co-located with the receiver 510 in a transceiver module. The transmitter 515 may utilize a single antenna or a set of multiple antennas.

The communication manager 520, the receiver 510, the transmitter 515, or various combinations thereof, or various components thereof, may be examples of means for performing aspects of the advanced adaptive receiver described herein based on SPEF utilization. For example, the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may support methods for performing one or more of the functions described herein.

In some examples, the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be implemented in hardware (e.g., in communication management circuitry). The hardware may include processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combinations thereof, configured or otherwise supporting units for performing the functions described in the present disclosure. In some examples, a processor and memory coupled with the processor may be configured to perform one or more of the functions described herein (e.g., by the processor executing instructions stored in the memory).

Additionally or alternatively, in some examples, the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be implemented in code (e.g., as communication management software or firmware) that is executed by a processor. If implemented in code executed by a processor, the functions of the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof, may be performed by a general purpose processor, a DSP, a Central Processing Unit (CPU), an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., units configured or otherwise supporting the functions described in this disclosure).

In some examples, communication manager 520 may be configured to perform various operations (e.g., receive, monitor, transmit) using receiver 510, transmitter 515, or both, or otherwise in cooperation with receiver 910, transmitter 915, or both. For example, communication manager 520 may receive information from receiver 510, send information to transmitter 515, or be integrated with receiver 510, transmitter 515, or both to receive information, send information, or perform various other operations as described herein.

According to examples as disclosed herein, the communication manager 520 may support wireless communication at the UE. For example, the communication manager 520 may be configured or otherwise support means for receiving one or more downlink grants from a base station within a threshold number of TTIs when operating according to a first reception state of a set of multiple reception states at a UE. The communication manager 520 may be configured or otherwise support a unit for determining a weighting factor for each TTI within a threshold number of TTIs, each of the weighting factors being based on a SPEF of channel communication between the base station and the UE. The communication manager 520 may be configured or otherwise enabled to sum at least a subset of the weighting factors to identify a unit of conversion determination. The communication manager 520 may be configured or otherwise support means for transitioning from a first reception state to a second reception state of a set of multiple reception states based on the transition determination value.

By including or configuring the communication manager 520 according to examples as described herein, the device 505 (e.g., a processor that controls or is otherwise coupled to the receiver 510, the transmitter 515, the communication manager 520, or a combination thereof) may support techniques for reducing processing, reducing power consumption, and more efficiently utilizing communication resources.

Fig. 6 illustrates a block diagram 600 of a device 605 supporting advanced adaptive receiver based on SPEF utilization in accordance with aspects of the present disclosure. The device 605 may be an example of aspects of the device 505 or UE 115 as described herein. The device 605 may include a receiver 610, a transmitter 615, and a communication manager 620. The device 605 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

The receiver 610 may provide a means for receiving information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels associated with advanced adaptive receivers based on SPEF utilization). Information may be passed to other components of the device 605. The receiver 610 may utilize a single antenna or a set of multiple antennas.

The transmitter 615 may provide a means for transmitting signals generated by other components of the device 605. For example, the transmitter 615 may transmit information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels associated with advanced adaptive receivers utilized based on SPEF). In some examples, the transmitter 615 may be co-located with the receiver 610 in a transceiver module. The transmitter 615 may utilize a single antenna or a set of multiple antennas.

The device 605 or various components thereof may be an example of a means for performing aspects of an advanced adaptive receiver based on SPEF utilization as described herein. For example, the communication manager 620 can include a grant receiving component 625, a weighting factor determining component 630, a weighting factor summing component 635, a state transition component 640, or any combination thereof. The communication manager 620 may be an example of aspects of the communication manager 520 as described herein. In some examples, the communication manager 620 or various components thereof may be configured to perform various operations (e.g., receive, monitor, transmit) using or otherwise in cooperation with the receiver 610, the transmitter 615, or both. For example, the communication manager 620 may receive information from the receiver 610, send information to the transmitter 615, or be integrated with the receiver 610, the transmitter 615, or both to receive information, send information, or perform various other operations as described herein.

According to examples as disclosed herein, the communication manager 620 may support wireless communication at the UE. The grant receiving component 625 may be configured or otherwise support means for receiving one or more downlink grants from a base station within a threshold number of TTIs when operating according to a first reception state of a set of multiple reception states at a UE. The weighting factor determination component 630 can be configured or otherwise support a unit for determining a weighting factor for each TTI within a threshold number of TTIs, each of the weighting factors being based on a SPEF of channel communications between the base station and the UE. The weighting factor summing component 635 may be configured or otherwise enabled to sum at least a subset of the weighting factors to identify units for converting the determined values. The state transition component 640 may be configured or otherwise support means for transitioning from a first receiving state to a second receiving state of a set of multiple receiving states based on a transition determination.

FIG. 7 illustrates a block diagram 700 of a communication manager 720 supporting an advanced adaptive receiver based on SPEF utilization in accordance with aspects of the present disclosure. Communication manager 720 may be an example of aspects of communication manager 520, communication manager 620, or both, as described herein. The communication manager 720, or various components thereof, may be an example of a means for performing aspects of the advanced adaptive receiver of the SPEF utilization based herein. For example, communication manager 720 may include grant receiving component 725, weighting factor determining component 730, weighting factor summing component 735, state transition component 740, SPEF determining component 745, scheduling rate evaluating component 750, CSI reporting component 755, burst detection evaluating component 760, or any combination thereof. Each of these components may communicate directly or indirectly with each other (e.g., via one or more buses).

According to examples as disclosed herein, the communication manager 720 may support wireless communication at the UE. Grant receiving component 725 may be configured or otherwise support means for receiving one or more downlink grants from a base station within a threshold number of TTIs when operating according to a first reception state of a set of multiple reception states at a UE. The weighting factor determination component 730 may be configured or otherwise support a unit for determining a weighting factor for each TTI within a threshold number of TTIs, each of the weighting factors being based on a SPEF of channel communications between the base station and the UE. The weighting factor summing component 735 may be configured or otherwise enabled to sum at least a subset of the weighting factors to identify units to convert the determined values. The state transition component 740 may be configured or otherwise support means for transitioning from a first receiving state to a second receiving state of a set of multiple receiving states based on a transition determination value.

In some examples, the SPEF determining component 745 may be configured or otherwise enabled to determine the SPEF for channel communications between the base station and the UE for each TTI based on a ratio between a first SPEF associated with scheduling information bits for each resource element scheduled by the base station and a second SPEF associated with a number of information bits for each resource element that the UE is capable of decoding.

In some examples, the SPEF determining component 745 may be configured or otherwise enabled to determine the first SPEF by summing one or more SPEF values of one or more respective codewords of the downlink grant, each of the one or more SPEF values being a product of a number of layers, a code rate, and a modulation order associated with the downlink grant for a respective codeword of the one or more respective codewords.

In some examples, the SPEF determining component 745 may be configured or otherwise support means for determining the second SPEF by estimating, at the UE, the ability to decode the number of information bits per resource element.

In some examples, CSI reporting component 755 may be configured or otherwise support a unit to send a channel state information report to the base station based on a mapping between the second SPEF and a rank indication, a channel quality index, or both.

In some examples, to support summing at least the subset of weighting factors to identify a transition determination value, the weighting factor summing component 735 may be configured or otherwise support a unit for summing respective weighting factors corresponding to respective TTIs having at least one of the one or more downlink grants.

In some examples, the transition determination value comprises a burst detection transition determination value based on summing at least the subset of weighting factors according to a burst detection function, and the state transition component 740 may be configured or otherwise support means for determining whether to transition from a first reception state to a second reception state based on the burst detection transition determination value, wherein the first reception state comprises a reception disallowed state and the second reception state comprises a reception standby state.

In some examples, burst detection evaluation component 760 may be configured or otherwise support a unit for comparing burst detection transition determination values to threshold burst detection transition determination values. In some examples, state transition component 740 may be configured or otherwise support means for determining whether to transition from a first receiving state to a second receiving state based on the comparison.

In some examples, state transition component 740 may be configured or otherwise enabled to determine to transition from the first receive state to the second receive state based on the burst detection transition determination exceeding a threshold burst detection transition determination.

In some examples, the threshold burst detection transition determination value is configured based on long-term downlink traffic statistics, short-term downlink traffic statistics, or both.

In some examples, the transition determination value comprises a scheduling rate transition determination value based on summing at least the subset of weighting factors according to a scheduling rate function, and the scheduling rate evaluation component 750 may be configured or otherwise support means for determining whether to transition from a first receiving state to a second receiving state based on the scheduling rate transition determination value, wherein the first receiving state comprises a receiving standby state and the second receiving state comprises a receiving disallowed state.

In some examples, scheduling rate evaluation component 750 may be configured or otherwise support a unit for comparing a transition determination value to a threshold scheduling rate transition determination value. In some examples, state transition component 740 may be configured or otherwise support means for determining whether to transition from a first receiving state to a second receiving state based on the comparison.

In some examples, state transition component 740 may be configured or otherwise support means for determining to transition from the first receive state to the second receive state based on the scheduled rate transition determination exceeding a threshold scheduled rate transition determination.

In some examples, the threshold scheduling rate conversion determination is configured based on long-term downlink traffic statistics, short-term downlink traffic statistics, or both.

In some examples, the first receive state is associated with a first number of receive antennas and the second receive state is associated with a second number of receive antennas different from the first number of receive antennas.

In some examples, the weighting factor is a function of subframe index of one or more downlink grants.

In some examples, the one or more downlink grants include a one-layer grant, a two-layer grant, or a combination thereof.

Fig. 8 illustrates a diagram of a system 800 including a device 805 that supports advanced adaptive receivers based on SPEF utilization in accordance with aspects of the present disclosure. Device 805 may be an example of device 505, device 605, or UE 115 as described herein or a component comprising device 505, device 605, or UE 115. The device 805 may communicate wirelessly with one or more base stations 105, UEs 115, or any combination thereof. Device 805 may include components for bi-directional voice and data communications, including components for sending and receiving communications, such as a communications manager 820, an input/output (I/O) controller 810, a transceiver 815, an antenna 825, a memory 830, code 835, and a processor 840. These components may be in electronic communication or otherwise (e.g., operatively, communicatively, functionally, electronically, electrically) coupled via one or more buses (e.g., bus 845).

The I/O controller 810 may manage input and output signals for the device 805. The I/O controller 810 may also manage peripheral devices that are not integrated into the device 805. In some cases, I/O controller 810 may represent a physical connection or port to an external peripheral device. In some cases, I/O controller 810 may utilize a controller such as, for exampleMS-MS-/> Or another known operating system. Additionally or alternatively, the I/O controller 810 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I/O controller 810 may be implemented as part of a processor, such as processor 840. In some cases, a user may interact with device 805 via I/O controller 810 or via hardware components controlled by I/O controller 810.

In some cases, device 805 may include a single antenna 825. However, in some other cases, the device 805 may have more than one antenna 825, which may be capable of sending or receiving multiple wireless transmissions simultaneously. The transceiver 815 may communicate bi-directionally via one or more antennas 825, wired or wireless links as described herein. For example, transceiver 815 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 815 may also include a modem for modulating packets, providing the modulated packets to one or more antennas 825 for transmission, and demodulating packets received from the one or more antennas 825. The transceiver 815 or transceiver 815 and one or more antennas 825 may be examples of a transmitter 515, a transmitter 615, a receiver 510, a receiver 610, or any combination or component thereof, as described herein.

Memory 830 may include Random Access Memory (RAM) and Read Only Memory (ROM). Memory 830 may store computer-readable, computer-executable code 835, code 1235 comprising instructions that when executed by processor 840 cause device 805 to perform the various functions described herein. Code 835 can be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, code 835 may not be directly executable by processor 840, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein. In some cases, memory 830 may contain, among other things, a basic I/O system (BIOS), which may control basic hardware or software operations, such as interactions with peripheral components or devices.

Processor 840 may include intelligent hardware devices (e.g., general purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combinations thereof). In some cases, processor 840 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into the processor 840. Processor 840 may be configured to execute computer readable instructions stored in a memory (e.g., memory 830) to cause device 805 to perform various functions (e.g., functions or tasks to support advanced adaptive receivers based on SPEF utilization). For example, device 805 or components of device 805 may include a processor 840 and a memory 830 coupled to processor 840, processor 840 and memory 830 configured to perform the various functions described herein.

According to examples as disclosed herein, communication manager 820 may support wireless communication at a UE. For example, communication manager 820 may be configured or otherwise support means for receiving one or more downlink grants from a base station within a threshold number of TTIs when operating according to a first reception state of a set of multiple reception states at a UE. The communication manager 820 may be configured or otherwise support a unit for determining a weighting factor for each TTI within a threshold number of TTIs, each of the weighting factors being based on a SPEF of channel communication between the base station and the UE. Communication manager 820 may be configured or otherwise enabled to sum at least a subset of the weighting factors to identify a conversion-determined value. The communication manager 820 may be configured or otherwise support means for transitioning from a first reception state to a second reception state of a set of multiple reception states based on the transition determination.

By including or configuring the communication manager 820 according to examples described herein, the device 805 may support techniques for improving communication reliability, reducing latency, reducing power consumption, more efficiently utilizing communication resources, improving coordination among devices, extending battery life, and improving utilization of processing power.

In some examples, communication manager 820 may be configured to perform various operations (e.g., receive, monitor, transmit) using transceiver 815, one or more antennas 825, or any combination thereof, or in cooperation with transceiver 1215, one or more antennas 1225, or any combination thereof. Although communication manager 820 is shown as a separate component, in some examples, one or more of the functions described with reference to communication manager 820 may be supported or performed by processor 840, memory 830, code 835, or any combination thereof. For example, code 835 may include instructions executable by processor 840 to cause device 805 to perform various aspects of an advanced adaptive receiver based on SPEF utilization as described herein, or processor 840 and memory 830 may be otherwise configured to perform or support such operations.

Fig. 9 shows a flow chart illustrating a method 900 of supporting a high-level adaptive receiver based on SPEF utilization in accordance with aspects of the present disclosure. The operations of method 900 may be implemented by a UE or components thereof as described herein. For example, the operations of method 900 may be performed by UE 115 as described with reference to fig. 1-8. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functionality.

At 905, the method may include receiving one or more downlink grants from a base station for a threshold number of TTIs while operating according to a first reception state of a set of multiple reception states at a UE. The operations of 905 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 905 may be performed by grant receiving component 725 as described with reference to fig. 7.

At 910, the method may include determining a weighting factor for each TTI within a threshold number of TTIs, each of the weighting factors being based on a SPEF of channel communications between the base station and the UE. The operations of 910 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 910 may be performed by the weighting factor determination component 730 as described with reference to fig. 7.

At 915, the method may include summing at least a subset of the weighting factors to identify a conversion determination. The operations of 915 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 915 may be performed by the weighting factor summing component 735 as described with reference to fig. 7.

At 920, the method may include transitioning from a first receiving state to a second receiving state of the set of multiple receiving states based on the transition determination. The operations of 920 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 920 may be performed by state transition component 740 as described with reference to fig. 7.

Fig. 10 shows a flow chart illustrating a method 1000 of supporting a high-level adaptive receiver based on SPEF utilization in accordance with aspects of the present disclosure. The operations of method 1000 may be implemented by a UE or components thereof as described herein. For example, the operations of method 1000 may be performed by UE 115 as described with reference to fig. 1-8. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functionality.

At 1005, the method may include receiving one or more downlink grants from a base station for a threshold number of TTIs while operating according to a first reception state of a set of multiple reception states at a UE. Operations of 1005 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1005 may be performed by grant receiving component 725 as described with reference to fig. 7.

At 1010, the method may include determining a SPEF for channel communication between the base station and the UE for each TTI based on a ratio between a first SPEF associated with scheduling information bits for each resource element scheduled by the base station and a second SPEF associated with a number of information bits for each resource element that the UE is capable of decoding. The operations of 1010 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1010 may be performed by the SPEF determination component 745 as described with reference to fig. 7.

At 1015, the method may include determining a weighting factor for each TTI within the threshold number of TTIs, each weighting factor based on a SPEF of channel communications between the base station and the UE. The operations of 1015 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1015 may be performed by the weighting factor determination component 730 as described with reference to fig. 7.

At 1020, the method may include summing at least a subset of the weighting factors to identify a transition determination. Operations of 1020 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1020 may be performed by the weighting factor summing component 735 as described with reference to fig. 7.

At 1025, the method can include summing respective weighting factors corresponding to respective TTIs having at least one of the one or more downlink grants. The operations of 1025 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1025 may be performed by the weighting factor summing component 735 as described with reference to fig. 7.

At 1030, the method may include transitioning from a first receiving state to a second receiving state of the set of multiple receiving states based on the transition determination. The operations of 1030 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1030 may be performed by state transition component 740 as described with reference to fig. 7.

FIG. 11 shows a flow chart illustrating a method 1100 of supporting a SPEF utilization based advanced adaptive receiver in accordance with aspects of the present disclosure. The operations of method 1100 may be implemented by a UE or components thereof as described herein. For example, the operations of method 1100 may be performed by UE 115 as described with reference to fig. 1-8. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functionality.

At 1105, the method may include receiving one or more downlink grants from a base station within a threshold number of TTIs while operating according to a first reception state of a set of multiple reception states at a UE. The operations of 1105 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1105 may be performed by grant receiving component 725 as described with reference to fig. 7.

At 1110, the method may include determining a weighting factor for each TTI within a threshold number of TTIs, each weighting factor based on a SPEF of channel communications between the base station and the UE. The operations of 1110 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1110 may be performed by the weighting factor determination component 730 as described with reference to fig. 7.

At 1115, the method may include summing at least a subset of the weighting factors to identify a conversion determination. The operation of 1115 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1115 may be performed by the weighting factor summing component 735 as described with reference to fig. 7.

At 1120, the method may include summing respective weighting factors corresponding to respective TTIs in a transmission time interval having a threshold number of at least one of the one or more downlink grants. The operations of 1120 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1120 may be performed by the weighting factor summing component 735 as described with reference to fig. 7.

At 1125, the method may include determining whether to transition from a first reception state to a second reception state based on the burst detection transition determination value, wherein the first reception state includes a reception non-allowed state and the second reception state includes a reception standby state. The operations of 1125 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1125 may be performed by state transition component 740 as described with reference to fig. 7.

At 1130, the method may include transitioning from a first receiving state to a second receiving state in the set of multiple receiving states based on the transition determination. The operations of 1130 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1130 may be performed by state transition component 740 as described with reference to fig. 7.

FIG. 12 shows a flow chart illustrating a method 1200 of supporting a SPEF utilization based advanced adaptive receiver in accordance with aspects of the present disclosure. The operations of method 1200 may be implemented by a UE or components thereof as described herein. For example, the operations of method 1200 may be performed by UE 115 as described with reference to fig. 1-8. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functionality.

At 1205, the method may include receiving one or more downlink grants from the base station for a threshold number of TTIs while operating according to a first reception state of a set of multiple reception states at the UE. Operations of 1205 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operation of 1205 may be performed by grant receiving component 725 as described with reference to fig. 7.

At 1210, the method can include determining a weighting factor for each TTI within a threshold number of TTIs, each weighting factor based on a SPEF of channel communications between the base station and the UE. The operations of 1210 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1210 may be performed by the weighting factor determination component 730 as described with reference to fig. 7.

At 1215, the method may include summing at least a subset of the weighting factors to identify a conversion determination. The operations of 1215 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1215 may be performed by the weighting factor summing component 735 as described with reference to fig. 7.

At 1220, the method can include summing respective weighting factors corresponding to respective TTIs having at least one of the one or more downlink grants. The operations of 1220 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1220 may be performed by the weighting factor summing component 735 as described with reference to fig. 7.

At 1225, the method may include determining whether to transition from a first reception state to a second reception state based on the scheduled rate conversion determination, wherein the first reception state includes a reception standby state and the second reception state includes a reception disallowed state. The operations of 1225 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1225 may be performed by scheduling rate evaluation component 750 as described with reference to fig. 7.

At 1230, the method may include transitioning from a first reception state to a second reception state in the set of multiple reception states based on the transition determination value. The operations of 1230 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1230 may be performed by state transition component 740 as described with reference to fig. 7.

Fig. 13 shows a flow chart illustrating a method 1300 of supporting a high-level adaptive receiver based on SPEF utilization in accordance with aspects of the present disclosure. The operations of method 1300 may be implemented by a UE or components thereof as described herein. For example, the operations of method 1300 may be performed by UE 115 as described with reference to fig. 1-8. In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functionality.

At 1305, the method may include receiving one or more downlink grants from a base station for a threshold number of TTIs while operating according to a first reception state of a set of multiple reception states at a UE. The operations of 1305 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1305 may be performed by the grant receiving component 725 as described with reference to fig. 7.

At 1310, the method may include determining a weighting factor for each TTI within a threshold number of TTIs, each weighting factor based on a SPEF of channel communications between the base station and the UE. Operations of 1310 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1310 may be performed by the weighting factor determination component 730 as described with reference to fig. 7.

At 1315, the method may include summing at least a subset of the weighting factors to identify a conversion determination. The operations of 1315 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1315 may be performed by the weighting factor summing component 735 as described with reference to fig. 7.

At 1320, the method can include summing respective weighting factors corresponding to respective TTIs in a threshold number of transmission time intervals having at least one of the one or more downlink grants. Operations of 1320 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1320 may be performed by the weighting factor summing component 735 as described with reference to fig. 7.

At 1325, the method may include determining whether to transition from a first reception state to a second reception state based on the scheduled rate conversion determination, wherein the first reception state includes a reception standby state and the second reception state includes a reception non-allowed state. The operations of 1325 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1325 may be performed by the scheduling rate evaluation component 750 as described with reference to fig. 7.

At 1330, the method may include comparing the transition determination to a threshold scheduling rate transition determination. Operations of 1330 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1330 may be performed by a scheduling rate evaluation component 750 as described with reference to fig. 7.

At 1335, the method may include determining whether to transition from a first reception state to a second reception state based on the comparison. The operations of 1335 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1335 may be performed by state transition component 740 as described with reference to fig. 7.

At 1340, the method may include transitioning from a first reception state to a second reception state of a set of multiple reception states based on the transition determination. Operations of 1340 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1340 may be performed by state transition component 740 as described with reference to fig. 7.

The following provides an overview of aspects of the disclosure:

aspect 1: a method for wireless communication at a UE, comprising: receiving one or more downlink grants from a base station within a threshold number of TTIs while operating according to a first one of a plurality of reception states at the UE; determining a weighting factor for each TTI within the threshold number of TTIs, each of the weighting factors being based at least in part on a spectral efficiency of channel communications between the base station and the UE; summing at least a subset of the weighting factors to identify a conversion determination; and transitioning from the first to a second one of the plurality of receiving states based at least in part on the transition determination value.

Aspect 2: the method of aspect 1, further comprising: the spectral efficiency of channel communication between the base station and the UE for each TTI is determined based at least in part on a ratio between a first spectral efficiency associated with scheduling information bits for each resource element scheduled by the base station and a second spectral efficiency associated with a number of information bits for each resource element that the UE is capable of decoding.

Aspect 3: the method of aspect 2, further comprising: the first spectral efficiency is determined by summing one or more spectral efficiency values of one or more respective codewords of a downlink grant, each of the one or more spectral efficiency values being a product of a number of layers, a code rate, and a modulation order associated with the downlink grant for each of the one or more respective codewords.

Aspect 4: the method according to any one of aspects 2 to 3, further comprising: the second spectral efficiency is determined by estimating, at the UE, a capability to decode the number of information bits per resource element.

Aspect 5: the method of aspect 4, further comprising: a channel state information report is sent to the base station based at least in part on the second spectral efficiency and a rank indication, a channel quality index, or a mapping therebetween.

Aspect 6: the method of any one of aspects 1-5, wherein summing at least the subset of the weighting factors to identify the conversion-determined value further comprises: respective weighting factors corresponding to respective ones of the threshold number of TTIs having at least one of the one or more downlink grants are summed.

Aspect 7: the method of aspect 6, wherein the transition determination value comprises a burst detection transition determination value based at least in part on summing at least the subset of the weighting factors according to a burst detection function, the method further comprising: determining whether to transition from the first reception state to the second reception state based at least in part on the burst detection transition determination value, wherein the first reception state includes a reception non-permission state and the second reception state includes a reception standby state.

Aspect 8: the method of aspect 7, further comprising: comparing the burst detect transition determination value with a threshold burst detect transition determination value; and determining whether to transition from the first receiving state to the second receiving state based at least in part on the comparison.

Aspect 9: the method of aspect 8, further comprising: a transition from the first receive state to the second receive state is determined based at least in part on the burst detect transition determination exceeding a threshold burst detect transition determination.

Aspect 10: the method of any one of aspects 8-9, wherein the threshold burst detection transition determination value is configured based at least in part on long-term downlink traffic statistics, short-term downlink traffic statistics, or both.

Aspect 11: the method of any of aspects 6-10, wherein the transition determination value comprises a scheduling rate transition determination value based at least in part on summing at least the subset of the weighting factors according to a scheduling rate function, the method further comprising: determining whether to transition from the first receiving state to the second receiving state based at least in part on the scheduled rate conversion determination value, wherein the first receiving state comprises a receiving standby state and the second receiving state comprises a receiving disallowed state.

Aspect 12: the method of aspect 11, further comprising: comparing the transition determination value with a threshold scheduling rate transition determination value; and determining whether to transition from the first receiving state to the second receiving state based at least in part on the comparison.

Aspect 13: the method of aspect 12, further comprising: a transition from the first receive state to the second receive state is determined based at least in part on the scheduling rate transition determination exceeding the threshold scheduling rate transition determination.

Aspect 14: the method of any of aspects 12-13, wherein the threshold scheduling rate conversion determination is configured based at least in part on long-term downlink traffic statistics, short-term downlink traffic statistics, or both.

Aspect 15: the method of any one of aspects 1-14, wherein the first reception state is associated with a first number of reception antennas and the second reception state is associated with a second number of reception antennas different from the first number of reception antennas.

Aspect 16: the method of any one of aspects 1-15, wherein the weighting factor is a function of subframe index of the one or more downlink grants.

Aspect 17: the method of any one of aspects 1-16, wherein the one or more downlink grants comprise a one layer grant, a two layer grant, or a combination thereof.

Aspect 18: an apparatus for wireless communication at a UE, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of any one of aspects 1 to 17.

Aspect 19: an apparatus for wireless communication at a UE, comprising at least one unit for performing the method of any one of aspects 1-17.

Aspect 20: a non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method of any one of aspects 1-17.

It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or otherwise modified, and that other implementations are possible. Further, aspects from two or more of the methods may be combined.

Although aspects of the LTE, LTE-A, LTE-a Pro or NR system may be described for purposes of example, and LTE, LTE-A, LTE-a Pro or NR terminology may be used in much of the description, the techniques described herein are applicable to areas outside of the LTE, LTE-A, LTE-a Pro or NR network. For example, the described techniques may be applicable to various other wireless communication systems such as Ultra Mobile Broadband (UMB), institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

The information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general purpose processor, DSP, ASIC, CPU, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software for execution by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwired or a combination of any of these items. Features that implement the functions may also be physically located at various locations including being distributed such that portions of the functions are implemented at different physical locations.

Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. Non-transitory storage media may be any available media that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media can comprise RAM, ROM, electrically Erasable Programmable ROM (EEPROM), flash memory, compact Disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, includes CD, laser disc, optical disc, digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

As used herein (including in the claims), an "or" as used in a list of items (e.g., a list of items ending with a phrase such as "at least one of" or "one or more of" indicates an inclusive list, such that a list of at least one of, for example A, B or C means a or B or C or AB or AC or BC or ABC (i.e., a and B and C). Furthermore, as used herein, the phrase "based on" should not be construed as a reference to a closed set of conditions. For example, example steps described as "based on condition a" may be based on both condition a and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on" is interpreted.

The term "determining" or "determining" includes a wide variety of actions, and thus, "determining" may include calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure), ascertaining and the like. Further, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in memory), and so forth. Further, "determining" may include parsing, selecting, establishing, and other such like actions.

In the drawings, similar components or features may have the same reference numerals. Furthermore, various components of the same type may be distinguished by following the reference label by a dash and a second label that is used to distinguish between similar components. If only a first reference label is used in the specification, the description applies to any one of the similar components having the same first reference label, irrespective of second or other subsequent reference labels.

The description set forth herein in connection with the appended drawings describes example configurations and is not intended to represent all examples that may be implemented or within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration," rather than "preferred" or "advantageous over other examples. The detailed description includes specific details for the purpose of providing an understanding of the described technology. However, these techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

The description herein is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a User Equipment (UE), comprising:

receiving one or more downlink grants from a base station for a threshold number of Transmission Time Intervals (TTIs) while operating according to a first one of a plurality of reception states at the UE;

determining a weighting factor for each transmission time interval within the threshold number of transmission time intervals, each of the weighting factors being based at least in part on a spectral efficiency of channel communications between the base station and the UE;

summing at least a subset of the weighting factors to identify a conversion determination; and

Based at least in part on the transition determination value, transitioning from the first to a second of the plurality of receiving states.

2. The method of claim 1, further comprising:

the spectral efficiency of channel communication between the base station and the UE for each transmission time interval is determined based at least in part on a ratio between a first spectral efficiency associated with scheduling information bits for each resource element scheduled by the base station and a second spectral efficiency associated with a number of information bits for each resource element that the UE is capable of decoding.

3. The method of claim 2, further comprising:

the first spectral efficiency is determined by summing one or more spectral efficiency values of one or more respective codewords of a downlink grant, each of the one or more spectral efficiency values being a product of a number of layers, a code rate, and a modulation order associated with the downlink grant for each of the one or more respective codewords.

4. The method of claim 2, further comprising:

the second spectral efficiency is determined by estimating, at the UE, a capability to decode the number of information bits per resource element.

5. The method of claim 4, further comprising:

a channel state information report is sent to the base station based at least in part on the second spectral efficiency and a rank indication, a channel quality index, or a mapping therebetween.

6. The method of claim 1, wherein summing at least the subset of the weighting factors to identify the conversion-determined value further comprises: summing respective weighting factors corresponding to respective ones of the threshold number of transmission time intervals having at least one of the one or more downlink grants.

7. The method of claim 6, wherein the transition determination comprises a burst detection transition determination based at least in part on summing at least the subset of the weighting factors according to a burst detection function, the method further comprising:

determining whether to transition from the first reception state to the second reception state based at least in part on the burst detection transition determination value, wherein the first reception state includes a reception non-permission state and the second reception state includes a reception standby state.

8. The method of claim 7, further comprising:

comparing the burst detect transition determination value with a threshold burst detect transition determination value; and

determining whether to transition from the first receiving state to the second receiving state based at least in part on the comparison.

9. The method of claim 8, further comprising:

a transition from the first receive state to the second receive state is determined based at least in part on the burst detect transition determination exceeding a threshold burst detect transition determination.

10. The method of claim 8, wherein the threshold burst detection transition determination value is configured based at least in part on long-term downlink traffic statistics, short-term downlink traffic statistics, or both.

11. The method of claim 6, wherein the transition determination comprises a scheduling rate transition determination based at least in part on summing at least the subset of the weighting factors according to a scheduling rate function, the method further comprising:

determining whether to transition from the first receiving state to the second receiving state based at least in part on the scheduled rate conversion determination value, wherein the first receiving state comprises a receiving standby state and the second receiving state comprises a receiving disallowed state.

12. The method of claim 11, further comprising:

comparing the transition determination value with a threshold scheduling rate transition determination value; and

13. The method of claim 12, further comprising:

a transition from the first receive state to the second receive state is determined based at least in part on the scheduling rate transition determination exceeding the threshold scheduling rate transition determination.

14. The method of claim 12, wherein the threshold scheduling rate transition determination value is configured based at least in part on long-term downlink traffic statistics, short-term downlink traffic statistics, or both.

15. The method of claim 1, wherein the first reception state is associated with a first number of reception antennas and the second reception state is associated with a second number of reception antennas different from the first number of reception antennas.

16. The method of claim 1, wherein the weighting factor is a function of subframe index of the one or more downlink grants.

17. The method of claim 1, wherein the one or more downlink grants comprise a one layer grant, a two layer grant, or a combination thereof.

18. An apparatus for wireless communication at a User Equipment (UE), comprising:

a processor;

a memory coupled to the processor; and

instructions stored in the memory and executable by the processor to cause the device to:

receiving one or more downlink grants from a base station for a threshold number of transmission time intervals while operating according to a first one of a plurality of reception states at the UE;

19. The apparatus of claim 18, wherein the instructions are further executable by the processor to cause the apparatus to:

20. The apparatus of claim 19, wherein the instructions are further executable by the processor to cause the apparatus to:

21. The apparatus of claim 19, wherein the instructions are further executable by the processor to cause the apparatus to:

22. The apparatus of claim 18, wherein the instructions that sum at least the subset of the weighting factors to identify the conversion determination are further executable by the processor to cause the apparatus to:

summing respective weighting factors corresponding to respective ones of the threshold number of transmission time intervals having at least one of the one or more downlink grants.

23. The apparatus of claim 22, wherein the transition determination comprises a burst detection transition determination based at least in part on summing at least the subset of the weighting factors according to a burst detection function, and the instructions are further executable by the processor to cause the apparatus to:

24. The apparatus of claim 23, wherein the instructions are further executable by the processor to cause the apparatus to:

25. The apparatus of claim 24, wherein the instructions are further executable by the processor to cause the apparatus to:

26. The apparatus of claim 22, wherein the transition determination comprises a scheduling rate transition determination based at least in part on summing at least the subset of the weighting factors according to a scheduling rate function, and the instructions are further executable by the processor to cause the apparatus to:

27. The apparatus of claim 26, wherein the instructions are further executable by the processor to cause the apparatus to:

28. The apparatus of claim 27, wherein the instructions are further executable by the processor to cause the apparatus to:

29. An apparatus for wireless communication at a User Equipment (UE), comprising:

means for receiving one or more downlink grants from a base station within a threshold number of transmission time intervals when operating according to a first one of a plurality of reception states at the UE;

means for determining a weighting factor for each transmission time interval within the threshold number of transmission time intervals, each of the weighting factors being based at least in part on a spectral efficiency of channel communications between the base station and the UE;

means for summing at least a subset of the weighting factors to identify a conversion determination; and

And means for transitioning from the first to a second one of the plurality of receiving states based at least in part on the transition determination value.

30. A non-transitory computer-readable medium storing code for wireless communication at a User Equipment (UE), the code comprising instructions executable by a processor to: